But usually how long will the colour last on hair?
I just work not long, i dont have a very good knowledge about
hair yet, but.
Highlight, without using colour shampoo around 4week will fade,
and cant last because u will trim it and it gone?
Whole head, usually the colour will stay and wont fade that
much. Is the root that grow black hair make your colour look weird,
Average person one month grow around 1cm of hair, by 3mth your root
black already 3cm? then your colour wont look that nice?
Depend what you use too, Semi-permanent or Permanent colour.